RFR: 8354702: [TestBug] LocalDateTimeStringConverterTest Workaround can be removed

[Andy Goryachev]

On Tue, 15 Apr 2025 20:16:04 GMT, Marius Hanl <mhanl at openjdk.org> wrote:

> [JDK-8297316](https://bugs.openjdk.org/browse/JDK-8297316) added a Workaround for the Japanese Date Converter, which is different on JDK20 and newer. Since our Boot JDK is Java 22 as of April 2025, we can remove the workaround.
> 
> We should also consider testing and closing: [JDK-8265727](https://bugs.openjdk.org/browse/JDK-8265727) and [JDK-8141350](https://bugs.openjdk.org/browse/JDK-8141350), which seems to work fine for me (German Locale, Test correctly changes that).

Looks good.

Unrelated note: the last three tests should not be parameterized since they seem to be testing specific conditions (we missed this during the review).

Since this is a test, we could fix it as a part of this PR, though I am sure @kevinrushforth would want a new JBS ticket.

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Marked as reviewed by angorya (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/1778#pullrequestreview-2769744814